The UK's productivity puzzle may be slightly less puzzling than it seemed. The Office for National Statistics (ONS) has published experimental estimates that suggest the country has been getting more output per hour of work than its current official measure shows.
Under the new method, output per hour grew at an average annual rate of 1.3% between 1997 and 2024, up from 1.1% under the existing approach. Over the full period, that adds up to a cumulative rise of almost 41%, compared with 34% using the current figures.
Why productivity matters
Productivity is a measure of how much the economy produces for each hour worked. It is often described as the key driver of living standards, because when workers produce more per hour, businesses can afford to pay higher wages without pushing up prices. Faster productivity growth also supports government revenues and public services.
For years, the UK has been stuck in what economists call a productivity puzzle: growth has been weak since the 2008 financial crisis, lagging behind other advanced economies. This new ONS work does not solve that puzzle, but it does suggest the picture may be slightly less gloomy than previously thought.
The difference between the two measures comes down largely to how hours worked are counted. The current official figures rely heavily on the Labour Force Survey, a household survey that has faced quality issues in recent years, including falling response rates. The new experimental method uses a different approach, drawing on a wider range of data sources, and it finds that total hours worked were lower than previously estimated. If fewer hours are being worked, then output per hour is higher.
What the new numbers show
The ONS is clear that these are experimental estimates, not a replacement for the official series. They are part of an ongoing effort to improve how productivity is measured, and the agency says it will continue to develop the methodology before deciding whether to adopt it.
Still, the direction of the change is notable. A 0.2 percentage point difference in annual growth may sound small, but compounded over nearly three decades it makes a meaningful difference to the cumulative gain. It also shifts the narrative around the UK's productivity performance, which has been a major concern for policymakers and investors alike.
The new method also appears to change the shape of the productivity trend over time. While the overall growth rate is higher, the pattern of weak growth after the financial crisis remains. So the puzzle is not gone, just smaller.
What it means for investors
For everyday investors, this is not a signal to rush out and buy UK stocks. But it is relevant context for anyone with money in the UK market, whether through pensions, ISAs, or index funds.
Productivity is a fundamental driver of corporate profits and economic growth. If the UK is actually more productive than official figures suggest, that could imply the economy has a bit more capacity than thought, which might influence how the Bank of England views inflation and interest rates. It could also feed into forecasts for company earnings and wage growth.
That said, the ONS itself stresses that these are experimental numbers, and they could be revised again. Investors should treat them as an interesting data point rather than a definitive upgrade to the UK's economic prospects.
The news also comes at a time when other economies are showing mixed signals. For instance, factory output in the eurozone slipped again in July, while Switzerland raised its 2026 growth forecast after a strong second quarter. In the UK, retailers like Next have recently raised profit forecasts while warning on sales growth, a reminder that the consumer picture remains uneven.
For now, the key takeaway is that the UK's productivity performance may be slightly better than the headline numbers suggest. That is a small but welcome piece of good news for an economy that has been wrestling with weak growth for years.
Investors will be watching to see whether the ONS eventually adopts this new method as its official measure, and whether other data revisions follow. If they do, the story of the UK economy over the past quarter-century could look a little different.
